CN101466143A - Method for the dynamic monitoring of a mobile entity group - Google Patents

Method for the dynamic monitoring of a mobile entity group Download PDF

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Publication number
CN101466143A
CN101466143A CN 200810184169 CN200810184169A CN101466143A CN 101466143 A CN101466143 A CN 101466143A CN 200810184169 CN200810184169 CN 200810184169 CN 200810184169 A CN200810184169 A CN 200810184169A CN 101466143 A CN101466143 A CN 101466143A
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entity
group
entities
list
method according
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CN 200810184169
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CN101466143B (en
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G·伯恩赛德
P·雅博
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阿尔卡特朗讯公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/26Network addressing or numbering for mobility support
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/08User group management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12Messaging; Mailboxes; Announcements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices
    • H04W88/04Terminal devices adapted for relaying to or from another terminal or user

Abstract

The invention relates to a method for the dynamic monitoring of a group of wireless-communication mobile entities, characterised in that it comprises the following operations: allocating a unique identifier to each entity; storing in a reference entity the list of the identifiers of all the entities of the group; determining for each entity a neighbourhood having a predetermined radius; for each entity of the group, recurrently detecting the other entities present in its neighbourhood; transmitting to the detected entities a message containing at least the identifier of the entity, and to be relayed to the reference entity; collecting in the reference entity the messages relayed thereto; drawing a list of the identifiers contained in the messages; comparing this list to the list stored; if the lists are identical, identifying the group as coherent; if this is not the case, identifying the group as non-coherent.

Description

用于动态监视一组移动实体的方法 For dynamically monitoring a group of mobile entities method

技术领域 FIELD

本发明涉及对一组无线通信移动实体的监视。 The present invention relates to the monitoring of a group of wireless communication of the mobile entity. 背景技术 Background technique

一组无线通信的移动实体自发地将其本身构造成无线个人区域网 A group of mobile wireless communication entity configured itself spontaneously to wireless personal area network

(WPAN)是很常见的,所述无线个人区域为也称作移动自组织(ad hoc) 网络(MANet),其具有不依赖于业已存在的现有基础设施的特定质量。 (WPAN) is common, the wireless personal area also referred to as mobile ad-hoc (ad hoc) networks (MANET), it is not dependent on having existing infrastructure already existing specific mass. 其是每个都配备有短距离(因此是低功耗的)无线发送器/接收器的一组人, 所述无线发送器/接收器例如基于IEEE 802.15标准定义的协议来操作,例如802.15.1 (蓝牙)或802.15.4 ( ZigBee )协议。 Which are each equipped with a short distance (and thus low power consumption) a group of people wireless transmitter / receiver, the wireless transmitter / receiver, for example, based on the IEEE 802.15 standard defines a protocol to operate, for example, 802.15. 1 (Bluetooth) or 802.15.4 (ZigBee) protocol.

给定这种网络的可能是短暂的特性,似乎有必要确保它受到动态监视以特别地维持其一致性,如果没有该一致性则网络可能被划分成不再能够相互通信的多个子组。 Given such a network may be transient characteristics, it seems to be necessary to ensure that dynamic monitoring of particularly maintain its consistency, the consistency if not the network may be divided into a plurality of sub-groups can no longer communicate with each other.

已经提出一种解决方案来减轻移动自组织网络的这个主要缺陷。 The main drawback to mitigate this mobile ad hoc networks have been proposed a solution. 在国际专利申请PCT WO 2005/009067 (爱立信)中描述的这个解决方案中, 一组移动终端中的一个移动终端被定义成参考点,并且该组中所有终端必须落入其中的、与该点的最大距离也被定义。 The solution in the international patent application PCT WO 2005/009067 (Ericsson) is described in a set of a mobile terminal in a mobile terminal is defined as a reference point, and the set of all terminals must fall therein, the point the maximum distance is also defined. 该组中每个终端与参考点之间的实际距离被测量,并且当这个距离超出最大距离时发出告警信号。 The actual distance between the reference point and each terminal in the group is measured, and an alarm signal when this distance exceeds a maximum distance.

这个解决方案仅针对特定的小型移动实体组拓朴而言是令人满意的。 This solution only for a specific group of small mobile entity in terms of topology is satisfactory. 这是因为假设参考点位于组的中心,这对于组施加了拓朴限制,因此对一些应用而言并不合适。 This is because it is assumed reference point is the center of the group, which is applied to a set of topological restrictions, and therefore is not suitable for some applications.

一个組可能希望维持其一致性而无须定中心于参考点。 A group may wish to maintain consistency without centering the reference point. 这对于成一列纵队行进的士兵列而言是真实的,其中期望维持他们的粘结性以避免丢失一个或多个落后者。 For this column is true for a soldier to travel column, where it is desired to maintain their adhesion to avoid the loss of one or more of the laggards. 通过选择通常位于队列前面的最高等级的士兵作为逻 By selecting the front of the queue it is typically located at the highest level as logic soldiers

辑参考点,当使用近程终端(例如蓝牙或Zigbee )时实施由爱立信的文件提出的解决方案是不可行的。 Series reference point, the solution proposed by the embodiment Ericsson file when the terminal using short-range (e.g., Bluetooth or Zigbee) is not feasible.

发明内容 SUMMARY

本发明旨在通过提出一种用于动态监视无线通信实体组的方法来减轻上述缺陷,这使之能够以简单可靠的方式监视所述组的一致性。 The present invention aims to propose a method for dynamic monitoring of a group of wireless communication entity to alleviate the aforementioned drawbacks, which makes it possible in a simple manner a reliable monitoring of the consistency group.

为此,本发明公开了一种用于动态监视一组无线通信移动实体的方法, 该方法包括下列步骤: To this end, the present invention discloses a method for dynamically monitoring a group of wireless communication for the mobile entity, the method comprising the steps of:

-为每个实体分配唯一的标识符; - for each entity is assigned a unique identifier;

-在参考实体中保存组中所有实体的标识符的列表; - save the list of all entities of the group identifiers in the reference entity;

-针对每个实体确定具有预定半径的邻近区域; -针对组中的每个实体重复地: - determining, for each entity having a neighboring area of ​​a predetermined radius; - for each entity in the group repeatedly:

-检测位于其邻近区域中的其他实体; - Detection of other entities located in the vicinity thereof;

-发送消息给检测的实体,所述消息至少包含所述实体的标识符, 并且要被中继给所述参考实体; -在所述参考实体内收集#:中继给它的消息; -创建包含于所述消息中的标识符的列表; -将该列表与保存的列表相比较; -如果所述列表是相同的,则确定所述组是粘结的; -否则,宣告所述组是非粘结的。 - send a message to the detected entity, said message comprising at least an identifier of the entity, and to be relayed to the referring entity; - # collecting within the referring entity: a relay message to it; - Creating in the list of identifiers contained in the message; - the list is compared with the saved list; - if the lists are identical, it is determined that the group is bonded; - otherwise, declaring the group of non- bond.

附图说明 BRIEF DESCRIPTION

参考附图,通过阅读下面的描述,本发明的其他目的和优点将变得明显,其中: Referring to the drawings, a reading of the following description, other objects and advantages of the invention will become apparent, wherein:

-图l概略地示出了无线通信实体的粘结的组; - Figure l schematically illustrates a wireless communication entity bonding group;

-图2概略地示出了由于丢失实体而变成非粘结的图1的组; - Figure 2 schematically shows a group entity becomes lost due unbonded Figure 1;

-图3概略地示出了由于丢失实体子组而变成非粘结的图l的组; - Figure 3 schematically illustrates a subset of entities due to the loss becomes non-bonded group of Figure l;

5-图4示出了根据本发明方法的各步骤; 5- FIG. 4 shows the respective steps of the method according to the invention;

-图5示出了根据本发明另一实施例的方法的各步骤。 - Figure 5 illustrates the steps of the method according to another embodiment of the present invention.

具体实施方式 Detailed ways

图1至图3示出了一組N个无线通信实体,例如蓝牙或Zigbee无线发送器/接收器,每个实体例如用于一组人中的一个成员以动态监视粘结性。 Figures 1 to 3 illustrate a set of N wireless communication entity, such as Bluetooth or Zigbee wireless transmitter / receiver, for each entity, for example, a member of a group of people to monitor the dynamic adhesion. 每个实体在图中用点表示。 Each point represents the entity in the figure.

每个移动实体i (其中l5i£N)关联于唯一的标识符IDi。 Each mobile entity i (where l5i £ N) associated with the unique identifier IDi. 假设每个实体根据其无线发射机的功率而拥有特定的发射范围。 Assuming that each entity has a particular range of transmit power in accordance with its radio transmitter. 为了监视在该范围 In order to monitor this range

内的组,定义虚拟的邻近区域;这是包含于其范围内的、具有预定半径R 的定心于实体i的圆形(如图l至3中的圆形所显示的那样)。 Group within the definition of a virtual neighborhood; which contain, (as shown in FIG. 3 l round to shown) having a predetermined radius R, centered in a circular entity i within its scope.

所述实体可以都具有相同半径的邻近区域(在这种情况下,R对于所有实体都相等),或者每个实体可以具有特定半径Ri的邻近区域。 The entity may have the same radius of the neighborhood (in this case, R are equal for all entities), or each entity may have a certain radius Ri of proximity.

在图4所示的本发明第一实施例中,移动实体组以下面的方式^tt视。 The first embodiment of the present invention shown in FIG. 4, the mobile entity group in the following manner depending ^ tt. 开始时,定义参考实体,所述实体负责监视所述组。 Initially, the definition of the reference entity, the entity responsible for monitoring the groups. 这个实体在一组 This entity in a group

人中可以是该组的领导(例如,监视一组孩子的成人)。 People who can be leaders of the group (for example, to monitor a group of adult children).

接着,确定组中的实体数N。 Next, determine the number of group of entities N. 这个数目被保存在所述参考实体中。 This number is stored in the reference entity. each

个实体因而被分配以唯一的标识符IDi,拟定实体的列表(即标识符的列 Thus entities is assigned a unique identifier IDi, prepared list of entities (i.e., an identifier of the column

表),这个列表被保存在所述参考实体内,并且每个实体的邻近区域的半 Table), this list is stored in the referring entity, and the half adjacent to the area of ​​each entity

径被确定。 Diameter was determined.

以循环的方式(例如每秒)针对组中的每个实体i执行下列操作: -实体i检测位于其邻近区域内的其他实体; In a cyclic manner (e.g., every second) perform the following operations for each entity i in the group: - i entities located in other entities detected in its neighborhood;

-实体i将包含标识符IDi的消息发送至检测到的实体,以关联于所述参考实体。 - IDi contains the identifier of the entity i to send a message to the entity detected, associated to the reference entity.

所述消息由所述参考实体收集,该参考实体创建包含于所有消息中的标识符的列表,然后通过比较这个列表和保存的列表来有规律地(例如每1.5秒)评估所述组的粘结性。 The message collection by the reference entity, the entity creates a list of reference identifiers included in all messages, and then by comparing this list to the saved list regularly (e.g., every 1.5 seconds) evaluating the adherend group nodal.

如果所述列表是相同的,则所述组被认为是粘结的。 If the lists are identical, then the group is considered to be bonded. 这意味着所有实体都能发送它们的标识符给所述参考实体,因此所有实体都在彼此的邻近区域内。 This means that all entities can transmit their identifiers to the entity reference, so that all entities are adjacent to each other in the region. 图l示出了这种粘结性情形。 Figure l shows this situation adhesion.

如果列表是不同的,这意味着当与保存的列表相比较时所收集的标识符的列表中遗失了至少一个实体,则所述组被认为是非粘结的。 If the lists are different, which means that when compared with the list stored in the list of identifiers in the collected at least one entity lost, then the group is considered non-cohesive. 这意味着至少一个实体在其邻近区域内没有实体或者没有位于任何其他实体的邻近 This means that at least one entity or entities not located not adjacent to any other entity in the vicinity thereof

区域内。 within the area. 图中显示了两个非粘结配置:图2中示出了第一个,其中(其邻近区域用虛线描绘的) 一个实体从所述组中分离出来;图3中示出了第二个,所述组被分成两个不连接的子组(这两个组之一的实体的邻近区域用虚线描绘),即这些子组中的每一个的邻近区域不包括另一子组的实体。 The figure shows two non-bonded configuration: Figure 2 illustrates in a first, in which a separate entity (which is depicted with dashed lines of adjacent regions) from the set; FIG. 3 shows a second a, the group is divided into two sub-groups are not connected (the vicinity of the two groups one entity is depicted by a broken line), i.e., the vicinity of these sub-groups each of a subset of the other entity does not include .

组的粘结性的检查可以更简单地基于所收集标识符的数目与最初保存在所述参考实体中的组中的实体数目的比较。 Adhesion inspection team may be more easily collected identifiers based on the number originally stored in the referring entity in Comparative number of entities in the group.

-如果所述参考实体收集的不同标识符IDi的数目P等于组中的实体的数目N,则该组因而被认为是粘结的。 - if the reference collection of different identifiers IDi entity number P is equal to the number of groups of entities N, the groups will be considered to be bonded.

-如果所述参考实体收集的不同标识符IDi的数目P小于组中的实体的数目N,则该组祐:认为是非粘结的。 - if the number of collected reference entity different identifiers IDi of an entity in the group P is smaller than the number N, the group Woo: that non-cohesive.

在图5所示的本发明第二实施例中,移动实体组以下列方式初L监视。 The second embodiment of the present invention shown in FIG. 5, the mobile entity in the following manner First group L monitor.

如上所述,定义所述参考实体。 As described above, defining the reference entity. 〗象之前那样,为所述实体分配唯一的标识符IDi,拟定实体的列表(即标识符列表),这个列表被保存在所述参考实体中,以及确定每个实体的邻近区域的半径。 As previously assigned to the entity〗 as the IDi unique identifier, a list of proposed entities (i.e., identifier list), the list is stored in the reference entity, and determining the radius of the vicinity of each entity.

以循环的方式(例如每秒),对于组中的每个实体i执行下列操作: -实体i检测位于其邻近区域内的其他实体; -评估所述实体与其邻近区域内检测到的实体之间间隔的距离; 一实体i向检测到的实体发送要被中继至所述参考实体并且包括标识 In a cyclic manner (e.g., per second), for the execution of each entity i in the set of the following: - i entities located in other entities detected in its neighborhood; - evaluating the adjacent region thereto within the entity detected between entities distance interval; i is sent to an entity to which the entity is detected to be relayed to the referring entity and comprising identification

符IDi的消息,以及包含检测到的实体的标识符和它们距所述实体的距离的表。 IDi message identifier, and a table containing the identifier of the entity detected and their distance from the entity.

所述消息由所述参考实体收集,该参考实体然后有规律地(例如每1.5 秒)以下面的方式评估组的粘结性。 The messages collected by the referring entity, then the entity reference regularly (e.g., every 1.5 seconds) adhesion assessed in the following groups.

所述参考实体从所收集的表中提取不同的标识符并且创建它们的列表。 The referring entity identifier extracted from different tables collected and creates a list of them. 如上文所述,与保存的标识符的列表相比较,以相同的方式推断出关于组粘结性的结论。 As described above, compared with a list of identifiers stored in the same manner as set deduce on adhesive properties.

换句话说,如果没有遗失标识符,则所有实体都被检测到或者能够发送消息至所述参考实体。 In other words, if no identifier is lost, all entities are detected or can send a message to the referring entity. 所述组因而被认为是粘结的。 The groups will be considered to be bonded.

另一方面,如果所述标识符从所收集的表中遗失,则这意味着实体从组中分离,并且或者在其邻近区域内不包含其他实体或者不在任何其他实体的邻近区域内。 On the other hand, if the identifier is missing from the collected in the table, this means that are physically separated from the group, and no other entity or in the vicinity thereof, or is not near any region other entities. 所述组因而被认为是非粘结的。 The groups will be considered non-cohesive.

可以在所述组被认为是非粘结的情况下设定发出告警,从而使得所指 Can set an alarm in the case of the non-bonded groups are considered, so that the meaning

对象(即在实际中是参考实体的运营商(carrier))能够采取必要的措施来将所述组变成粘结的,例如通过找出所述组中的遗失的单元并且重新将它们纳入其中。 Object (i.e., reference carriers entity in practice (Carrier)) to take the necessary measures to be set into the adhesive, for example by finding the set of missing cells and incorporate them back . 由所述参考实体发出的这种告警可以是音频和/或可视告警。 Such a warning being issued by the reference entity may be an audio and / or visual alert.

如果所述组被认为是非粘结的,则计划遗失实体的标识是优选的。 If the groups are considered non-bonded, then the program is lost entity identifier preferred. 这种标识可以简单地通过识别保存在参考实体中的组中所有实体标识符的列表中的未接收到的标识符来执行。 Such groups can be easily identified by identifying the reference stored in the list of all entities in the entity identifiers in the received identifier is not performed.

因此,为了恢复组的粘结性,可以规定在与组中的实体所形成的自组织网络内执行的通信相分离的信道上向任何遗失实体的运营商发送消息(例如通过文本消息),从而命令它重新加入所述组。 Accordingly, in order to recover the group of adhesion, can be performed within a predetermined communication network and the ad-hoc group formed entities phase separation channel transmitted to the operator entity of any missing message (e.g., via a text message), so that command rejoin the group. 所述参考实体也可以识别之前位于任何遗失实体的邻近区域内或其邻近区域之前包括任何遗失实体的实体。 It includes any entity previously located within the lost entity for any missing entity or a neighboring region adjacent to the region before the referring entity can be recognized. 这些实体例如可以受到^皮请求找出一个或多个遗失实体以将其重新纳入所述组的运营商和参考实体的警告。 These entities can be, for example, transdermal ^ request to identify one or more entities to be missing warning back into the carrier and the reference set of entities.

可以提供附加操作以实现更准确的组监视。 Additional operations may be provided to achieve a more accurate monitoring group.

因此,可以针对组中的每个实体事先定义位于其邻近区域内的实体的最小限额。 Thus, the group may be previously defined for each entity at the minimum limit of entities within the vicinity thereof. 在这种情况下,在检测到其邻近区域内的其他实体的同时,实体i重复地对这些实体计数。 In this case, while detecting the other entities in the adjacent area, the entity i repeatedly counting of these entities. 接着,所述实体将如此检测到的实体的数目包含于被发送给其邻近区域内的实体的信号中,所述信号要被中继到所述参考实体。 Next, the thus detected number of the entity included in the entity in the signaling entity is transmitted to the adjacent area, the signal to be relayed to the referring entity.

这样,所述参考实体除了实际上位于所述组中的实体数目之外还具有附加的信息,即每个实体邻近区域内发现的实体数目,这是组密度特征。 Thus, in addition to the referring entity the number of entities in the set is actually located further includes additional information, i.e., the number of entities each entity found in the neighborhood, which is set density characteristics.

8在该密度是要监视的组的特征之一的情况下,当该密度低于最小阈值时警告所指对象可能是有用的,所述最小阈值指示了组的分敉。 One of the features of the case 8 is to monitor the density of the group, when the density is below a minimum threshold warning may be useful referents, the minimum threshold value indicates the Mi sub-group. 由所述参考实体发出的这种警告可以是音频和/或视频告警。 This warning is issued by the reference entity may be an audio and / or video alert. 根据所观测的密度可以提供各种程度的告警。 The observed density may provide various levels of alarm.

例如,如果组中的至少一个实体具有其邻近区域内的单个实体则可以 For example, if a group of at least one entity with a single entity within the vicinity thereof can be

发出红色告警;如果组中至少一个实体具有其邻近区域内的另外两个实体可以发出橙色告警;以及,如果任何实体具有其邻近区域内的另外至少三个实体则不发出告警。 Emits red alarm; group if at least one entity having two additional entities within their proximity warning may be issued orange; and, if any entity having at least three additional entities within the adjacent region is not an alarm.

利用上述方法,可以以简单的方式动态监^L组而无须集中于中心实体内的存在通知的发送。 With the above method, in a simple manner the dynamic monitoring ^ L groups without the presence of the transmitted concentrated in the center of the notified entity.

这个方法因而针对要监视的组实现了更大的灵活性,所述组可以采取各种不同的拓朴(例如成一列纵队),同时维持其粘结性。 This method thus allows greater flexibility for the group to be monitored, the group may take a variety of different topologies (e.g., as a column), while maintaining its adhesive property.

Claims (9)

1. 一种用于动态监视一组无线通信移动实体的方法,其特征在于,包括:-为每个实体分配唯一的标识符;-在参考实体内保存所述组中的所有实体的标识符的列表;-针对每个实体确定具有预定半径的邻近区域;-针对所述组中的每个实体重复地:-检测位于其邻近区域中的其他实体;-发送消息至检测的实体,所述消息至少包含所述实体的标识符,并且要被中继给所述参考实体;-在所述参考实体内收集被中继给它的消息;-创建包含于所述消息内的标识符的列表;-将这个列表与所保存的列表相比较;-如果所述列表是相同的,则确定所述组是粘结的;-否则,确定所述组是非粘结的。 A dynamic monitoring of a group of wireless communication methods for mobile entity, characterized by comprising: - for each entity is assigned a unique identifier; - save the group identifiers for all entities in the entity within a reference list; - determining, for each entity having a neighboring area of ​​a predetermined radius; - for each entity in the group is repeatedly: - detecting the other entities located in the vicinity thereof; - the entity to send a message detection, the message comprising at least an identifier of the entity, and to be relayed to the referring entity; - the entity in the reference collection message is relayed to it; - Create the list included in the message identifier ; - this list is compared with the stored list; - if the lists are identical, it is determined that the group is bonded; - otherwise, determining the group of non-cohesive.
2. 根据权利要求1所述的方法,其中,由每个实体发送给其邻近区域内的实体的消息包括那些实体的标识符。 The method according to claim 1, wherein the message transmitted by each entity to the entities in the adjacent region includes an identifier of those entities.
3. 根据权利要求2所述的方法,该方法针对每个实体包括评估它与它邻近区域内的实体之间间隔的距离这一操作,并且其中,所发送的消息包括所iiJ巨离。 3. The method according to claim 2, the method includes evaluating the distance interval between the entities within it and its adjacent area of ​​the operation, for each entity, and wherein the transmitted message comprises a giant from the iiJ.
4. 根据权利要求1所述的方法,包括以下操作:针对每个实体定义位于其邻近区域内的实体的最低限额,以及针对每个实体计算在其邻近区域内检测到的实体的数目。 4. The method according to claim 1, comprising the following operations: is located, and the number of entities is calculated for each entity is detected within the threshold region adjacent entities within the region for each adjacent entity definition.
5. 根据权利要求4所述的方法,其中,对于每个实体,所发送的消息包含在其邻近区域内检测到的实体的数目。 The method according to claim 4, wherein, for each entity, the transmitted message contains the number of entities detected in its vicinity.
6. 根据权利要求5所述的方法,包括这样的操作:如果对于所述组中的至少一个实体而言在其邻近区域内检测到的实体的数目小于最低限额, 则发出告警。 6. The method as claimed in claim 5, comprising such an operation: If the number of entities detected in its proximity to the at least one entity in terms of the group is less than threshold, an alarm is issued.
7. 根据权利要求1所述的方法,包括这样的操作:如果所述组被认为是非粘结的,则识别任何遗失的实体,其中针对该遗失的实体没有标识符被中继给所述参考实体。 7. The method according to claim 1, comprising such an operation: if the groups are considered non-cohesive, any missing entity is identified, which is not relayed to the reference identifier for the lost entity entity.
8. 根据权利要求7所述的方法,包括这样的操作:如果所述组被认为是非粘结的,则识别之前位于遗失实体的邻近区域内或其邻近区域之前包括遗失实体的任何实体。 8. The method according to claim 7, comprising such an operation: if the previous non-bonded groups are considered, the identify missing entity includes any entity located before the lost entity or a neighboring region adjacent to the region.
9. 根据权利要求1所述的方法,包括:如果所述组被认为是非粘结的, 则发出告警。 9. The method according to claim 1, comprising: if the group is considered non-cohesive, an alarm is issued.
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